Messieurs !
The ESCI / ITALERI German Military WW2 carts do fit well to WW 1 also, because they stem from pre-WW 1 times;
on photos I could not make out any difference between the open carts of WW1 & WW 2; maybe the medical cart
Shows some differences ? - but they are minor ones!
So, do not hesitate to use the carts !
Even the Minicraft Carts are usable, because carts do come in a lot of seizes; you do not notice "underseized" cart wheels
gauge 1/35, I think !
Gunther